GB/T 34675-2017 PDF EnglishUS$155.00 · In stock · Download in 9 seconds
GB/T 34675-2017: Determination of volatile organic compound (VOC) content in radiation curable coatings Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 34675-2017: Determination of volatile organic compound (VOC) content in radiation curable coatings---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT34675-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 87.040 G 50 Determination of volatile organic compound (VOC) content in radiation curable coatings Issued on. NOVEMBER 01, 2017 Implemented on. NOVEMBER 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. Table of ContentsForeword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 5 4 Principle... 5 5 Equipment... 6 6 Samples... 7 7 Test procedure... 7 8 Test data processing... 9ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard shall be under the jurisdiction of the National Standardization Technical Committee for Coatings and Pigments (SAC/TC 5). Drafting organizations of this standard. CNOOC Changzhou Coating Chemical Research Institute Co., Ltd., Zhejiang Youqian Special Materials Co., Ltd., Guangzhou Kinte Material Technology Co., Ltd., Fujian Product Quality Inspection and Research Institute, Sichuan Jiabaoli Coating Co., Ltd., Shenzhen Guangtian Environmental Coating Co., Ltd., Hezhong (Foshan) Chemical Co., Ltd., Sankeshu Coating Co., Ltd., Guangdong Xigui Light Curing Material Co., Ltd., Guangzhou Biaogeda Laboratory Equipment Co., Ltd., Guangdong Eneng Nano Technology Co., Ltd. The main drafters of this standard. Zhou Xiangling, Ji Junhong, Chen Mengru, Zhang Jie, Li Jie, Ye Caiping, Wu Yong, Peng Yongsen, Wu Yong, Kang Lunguo, Xu Junqiang, Wang Chongwu, Xiao Qiaobing. Determination of volatile organic compound (VOC) content in radiation curable coatings1 ScopeThis standard specifies the terms and definitions, principles, equipment, samples, experimental procedures, test data processing for determining the content of volatile organic compounds (VOC) in radiation curable coatings. This standard applies to the determination of volatile organic compound (VOC) content in coatings cured by radiation curing methods such as ultraviolet light (UV) and electron beam (EB). UV curing and electron beam curing inks and adhesives can also refer to this standard.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 3186 Paints varnishes and raw materials for paints and varnishes - Sampling GB/T 5206-2015 Paints and varnishes - Terms and definitions GB/T 6750 Paints and varnishes - Determination of density - Pycnometer method GB/T 6753.4-1998 Paints and varnishes - Determination of flow time by use of flow cups3 Terms and definitionsThe following terms and definitions apply to this document. 3.1 Volatile organic compound content; VOC content; VOCC The mass of the volatile organic compounds in the paint measured under the specified conditions. 3.2 Ultraviolet curing; UV curing The hardening process of a paint exposed to ultraviolet radiation. 3.3 Electron beam curing; EB curing The process of rapid curing of the specially formulated coatings by a beam of concentrated electrons.4 PrincipleAfter preparing the specimen, use an appropriate method to determine the non- volatile content of the specimen under specified conditions according to the type of specimen.5 Equipment5.1 Metal flat-bottom dish The diameter is (75 ± 5) mm and the edge height is 5 mm or it can ensure that the specimen does not overflow. It is also possible to use dishes of different diameters. At this time, use formula (1) to calculate the mass m of the specimen used for the test, unit in gram (g). 5.2 Syringe Disposable syringe with a capacity of 1 mL. 5.3 Oven Warning - In order to prevent explosion or fire, samples containing volatile substances shall be handled with care and shall be implemented in accordance with relevant national regulations. 5.4 Dryer Packed with a suitable desiccant, such as dry silica gel impregnated with cobalt chloride. 5.5 Balance The accuracy is 0.1 mg.6 SamplesTake sample according to the provisions of GB/T 3186, or according to the agreed method; the sampling volume is determined according to the inspection needs.7 Test procedure7.1 Non-volatile content 7.1.1 Do three tests in parallel. 7.1.2 Degreasing and cleaning metal flat-bottom dishes (see 5.1). In order to improve the measurement accuracy, the dish (see 5.1) is baked in an oven (see 5.3) at (110 ± 2) °C for 30 minutes before the test and placed in a desiccator (see 5.4). 7.1.4 Weigh the mass m0 of the metal flat-bottom dish (see 5.1), accurate to 0.1 mg. Weigh (0.2 ± 0.1) g of the specimen to be tested (see 7.1.3) into a dish (see 5.1) and spread it evenly, accurate to 0.1 mg. 7.1.5 Immediately after the weighing, immediately transfer the metal flat- bottomed dish (see 5.1) containing the specimen into oven (see 5.3); heat it at (50 ± 2) °C for 30 min. 7.1.7 After radiation curing, transfer the dish into an oven (see 5.3) at (110 ± 2) °C and heat it for 60 minutes. After the heating time is over, place the dish in a desiccator (see 5.4) to cool and weigh the mass m2 of the specimen residue and the dish, accurate to 0.1 mg.8 Test data processing8.1 General Calculate the volatile organic compound (VOC) content of the specimen according to the method specified in the standard. Since calculation method 1 does not involve the measurement of density (other errors will be introduced), it has better precision and is a preferred calculation method. 8.2 Calculation method 1 The volatile organic compound (VOC) content w (VOC) (mass fraction) of the specimen is calculated according to formula (3). 8.3 Calculation method 2 The volatile organic compound (VOC) content ρ (VOC) of the specimen is calculated according to formula (4). 8.4 Calculation method 3 The volatile organic compound (VOC) content ρ (VOC) 1w of the specimen after deducting moisture is calculated according to formula (5). ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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